Transmitter-support



F. u. WALDRON.

TRANSMITTER SUPPORT. APPLICATION FILED rga. 25, 1918.

5M 0. Wa/dr'a/r.

Patented Jan. 27, 1920.

UNITED sTATEs PATENT OFFICE.

FRED D. WALDRON, OF BROOKLYN, NEW YORK, ASSIGNOR TO WESTERN ELECTRIC 7 COMPANY, INCORPORATED, OF NEW Y'QRK, N. Y., A CORPORATION OF NEW YORK.

TRANSMITTER-SUPPORT.

To all whom it may concern:

citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Transmitter-Supports, of which the following is a full, clear, concise, and exact description.

This invention relates in general to a transmitter support and more in particular to a breast plate for such a support.

In various places there is a demand for telephone apparatus that can be supported upon the body of the user in such a way as to leave his hands free and permit his carrying on a conversation, should occasion arise, without in any way interfering with his other duties or obscuring his line of vision. Such, for example, is the case in connection with aeroplanes where the disturbances set up by the rush of air and by the violent explosions of the engines make it necessary to resort to telephone apparatus for communication between the pilot and the observer. It is, however, of the utmost importance that this apparatus be so designed as not to in any way interfere with the users performing his various duties or obscure his line of vision.

It is therefore the object of the present invention to provide for use under such conditions a breast plate which may be so secured as to remain in a fixed position with respect to the user irrespective of his movements and moreover, one which will not cause him any inconvenience or interfere with his breathing.

To attain this object, a feature of the invention resides in the use of a transmitter breast'plate to which are fastened resilient members provided with means for securing the ends of strap which is designed to pass around the users chest and hold the plate securely in position.

The various features of the invention may be more clearly understood by referring to the accompanying drawing in which Figure 1 is a front view showing a transmitter breast plate embodying this invention and Fig. 2 is a top view showing more clearly the resilient means for holding the transmitter support in position.

The triangular breast plate 1, which is similar to the breast plate commonly used by switchboard operators, is preferably Specification of Letters Patent.

Patented J an. 27, 1920 Application filed February 25, 1818. Serial No. 219,004.

made of aluminum and the edges are bent over in order to provide a plate of the necessary rigidity with the least possible weight. At the upper corners of'the plate projections are provided to engage the snaps 22 of a strap 3 which is adapted to pass over the shoulders and around the neck of the user in the well-known manner. Rigidly secured to the center of the breast plate 1 is a bowshaped member 4, the extending arms 55 of which are bent forward and are provided with projections adapted to engage the snaps 6- 6 (only one of which is shown) of strap 7 which is of suitable length to pass around the chest of the user.

The transmitter S is secured to the capshaped member 10, which inturn is threaded on the tubular arm 11. To the lower end of arm 11 is secured the lug 12 which fits into the bracket 13 and is held in any given position by means of the threaded lug 14 and the thumb nut 15. The bracket 18 is rigidly secured to a plate 16 which is fastened to the breast plate 1 in a manner permitting its r0- tation in a plane parallel to that of the breast plate itself. This is accomplished by the use of a'shouldered stud (not shown in the drawing) which is riveted to the breast plate 1, the shouldered portion bearin against the plate 16. The length of this stud and its diameter is such as to permit the plate 16 to rotate thereon. The plate 16 is recessed at 17 and a stop pin 18 riveted to the member 4 limits the amount of rotation in either direction. Also fastened rigidly to the member 4 is the spring 19. the free end of which has an offset portion adapted to engage the projection 20 of plate 16 and hold the transmitter in place when the arm 11 is in a vertical plane, which is the most suitable position for talking. WVhen not in use, the transmitter is placed to one side and is held in that position by its own Weight and the action of the plate 16 against the stop pin 18. The lower portion of brea t plate 1 is provided with a ring 21 to which is fastened the stay cord 22. the conductors 23 passing on up through the hollow arm 11 and into the cup-shaped member 10, where they are secured to the transmitter terminals.

The bow-shaped member 4 not only provides two additional means of support for the transmitter breast plate. but the re ilient extensions of this member permit the breast plate being firmly fixed in a given position With respect to the user and without causing any discomfort or inconvenience. Experience has shown that such a construction is of decided advantage for use on aeroplanes where it is imperative that the apparatus be instantly available for use and yet require the least possible attention or mental efiort on the part of the user.

What is claimed is:

1. In a transmitter support, a breast plate having a transmitter mounted thereon, means for suspending said breast plate in position, and a plate member having a resilient extension thereon cooperating with a strap member for holding said breast plate in a fixed position with respect to the user.

2. In a transmitter support, a breast plate having a transmitter adjustably mounted thereon, means for suspending said breast plate in position, and a plate member having a pair of extension spring members cooperating with a strap member for holding said breast plate in a fixed position with respect to the user.

3. In a transmitter support, a breast plate having a transmitter mounted thereon, meansior suspending said breast plate in position, and a resilient plate secured to said breast plate and provided with extensions adapted to be engaged by a strap member to hold the breast plate in a fixed position with respect to the user.

In a transmitter support, a triangular breast plate having a transmitter adjustably mounted thereon, projections on said breast plate adapted to cooperate with a strap member passing around the neck of the user, whereby the breast plate may be suspended in the desired position, and a bow-shaped resilient plate rigidly secured to said breast plate, said resilient plate having a pair of extending arms provided at their ends with means for engaging a strap member adapted to pass about the chest of the user to hold said breast plate in a fixed position with respect thereto.

In witness whereof I hereunto subscribe my name this 14th day of February, A. D. 1918.

FRED D. WALDRQN. 

